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Q1) Researchers at pharmaceutical company have found that effective time duration of safe dosage of pain relief drug is normally distributed with mean two hours and standard deviation 0.3 hours. For what proportion of patients will drug be effective for between 2 and 2.25 hours?
In order to make little money for holidays, Farmer Fred is raising turkeys. Male of the species he has selected has mean weight of 17 pounds at maturity and standard deviation of 1.8 pounds. Weights are known to be normally distributed.
i) Determine the probability of randomly selected male turkey weights of at least 17.5 pounds at maturity?
ii) Determine the probability of random sample of 49 male turkeys having average of at least 17.5 pounds at maturity?
Estimate the values using multiple regression models. An air conditioning as well as heating repair firm conducted a study to determine if the outside temperature, Illustrate the forecasted monthly electric bill.
A normal distribution with a mean of 55 and a standard deviation of 6 is evaluated to solve a business problem.
If a proposal evaluator randomly selected two proposals, what is the probability that both of them met the specified?
The weight of a product is normally distributed with a mean of four ounces and a variance of .25 "squared ounces." What is the probability that the randomly selected unit from a recently manufactured batch weighs no more than 3.50 ounces.
Data in table represent number of consumer complaints against major U.S. airlines. If one complaint from table is arbitrarily chosen, determine the probability that it was filed against United Airlines.
Find a 96% confidence interval for the true percentage of all households that have central air conditioning. Write a sentence that interprets this interval.
Calculate the correlation and the regression equation and plot the data in the space provided.
Findout the margin of error for this survey if we want a 99 percent confidence in our estimate of the percent of adults over 50 who take vitamin supplements.
Find the expected GPA when SAT = 800. Find E (GPA|SAT = 1,400). Comment on the difference.
Utilizing the .05 level, do the results support the psychologists' theory. A psychologist theorized where people can hear better when they have just eaten a large meal.
The upper limit of a 95% confidence interval for the population mean would equal:
Test the given claim. Identify the null hypothesis, alternative hypothesis, test statistic, P-Value or critical value(s), conclusion about the null hypothesis, and final conclusion that addresses the original claim.
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